Haha i have no idea if the center diff is locked, i haven't messed with it since i bought the truck. So if it comes locked from the factory or not i have no idea? How do i lock and unlock the center diff?

I believe it's under 60 days that i've had the truck, can i just call Cen and ask for a replacement part or do i need to find out who i purchased it from and ask them? I bought mine new off e-bay, i assume these people are dealers since they sell tons of them.

Also with the gears? I have no idea how to check 2nd gear or what not. I don't even know if the truck has went into 3rd gear or not, i couldn't really ever hear it but it was fast so i just assumed it did?
So when you say things like "lock your 2nd gear into engagement" i have no idea how to do that?